British Royal Family members arrive for Christmas Day church service

Meghan, Harry and the Duke and Duchess of Cambridge arrive for Christmas Day church service

1 of 15

The British royal family members celebrate Christmas together

Prince Harry, Meghan Markle and the Duke and Duchess of Cambridge have arrived for the annual British royal family Christmas Day service at St. Mary Magdelene Church in Sandringham.

Well-wishers appeared in their droves to catch a glimpse of the newest royal family member - Meghan Markle. She arrived arm in arm with her new finance, Prince Harry, and the pair walked alongside the Duke of Cambridge and a pregnant Catherine. Meghan dressed in a chic camel coat with a matching brown beret, while the Duchess chose a festive checked coat which displayed her growing baby bump.

The service is the first time Meghan and Harry have appeared together since their first official public engagement, shortly after announcing their upcoming wedding last month.

Also attending the church service was Queen Elizabeth and Prince Philip, Prince Charles and Camilla and Princesses Beatrice and Eugenie.

2 of 15

A quick who's-who of the British Royal Family members

The British Royal Family boasts a lot of members, so it's understandable if you get them all mixed up sometimes.

This quick guide is a who's-who of the royals, helping you know your Princess Anne from your Sophie, Countess of Wessex - and the roles they all play.

Click through the gallery to learn more.

3 of 15

Her Majesty The Queen

The world’s longest-reigning living monarch, Queen Elizabeth II has been on the British throne since February 1952.

Her Majesty was the firstborn child of King George VI and Queen Elizabeth, later the Queen Mother.

She acceded the throne at age 25 following the sudden death of her father from an array of illnesses, including lung cancer.

Her reign has transversed several major world events, from terrorist attacks to natural disasters, in additional to dramas within the Royal Family.

2017 was a big year for the 91-year-old, who became the first British monarch to celebrate a Sapphire Jubilee and also marked her 70th wedding anniversary.

4 of 15

Prince Philip, the Duke of Edinburgh

Born Prince Philip of Greece and Denmark, Philip Mountbatten became a naturalised British subject when he married Princess Elizabeth, his second cousin once removed, in 1947.

The former military commander retired from his public responsibilities in 2017 at age 96, having completed thousands of solo duties over the years.

The Duke of Edinburgh has been an occasionally controversial figure throughout his reign as the Queen’s consort, thanks to a series of cringeworthy gaffes.

5 of 15

Charles, Prince of Wales

The eldest child of Queen Elizabeth and Prince Philip, Prince Charles holds several royal records. He is the longest serving Prince of Wales, England’s longest serving heir, and was the first British heir to graduate from university.

Born in 1948, Charles followed family tradition by serving in the military.

The 69-year-old is a father of two and has been married twice - first to the late Princess Diana, and then Camilla Parker Bowles, now the Duchess of Cornwall.

The public breakdown of his marriage to Diana, and the subsequent revelation of an affair with Camilla, landed Charles in the headlines worldwide.

6 of 15

Camilla, Duchess of Cornwall

Camilla Parker Bowles is said to have met Prince Charles for the first time in the early 1970s. The pair grew close and developed a relationship, which ended for unclear reasons.

Prince Charles married Lady Diana Spencer in 1981. Just over a decade later, his affair with Camilla - who was married to Andrew Parker Bowles - was revealed with the publication of a book about Diana.

Following the end of both their marriages - and the tragic death of Princess Diana - the couple made their first public appearance together in 1999. They married in a civil ceremony in 2005.

Camilla lives with Charles at Clarence House, and is dedicated to raising awareness for causes including osteoporosis, rape and sexual assault, and literacy.

7 of 15

William, Duke of Cambridge

The eldest child of Prince Charles and Princess Diana, and second in the line of succession, Prince William was born in 1982.

He graduated with a geography degree from the University of St Andrews in Scotland - where he met his future wife - and served in the British Armed forces until 2013.

William later worked as a rescue helicopter pilot, but completed the role in 2017 to focus on his royal duties.

In 2011, William married Kate Middleton, his girlfriend of eight years, at Westminster Abbey and became the Duke of Cambridge. The couple are expecting their third child in April 2018.

8 of 15

Prince Henry of Wales

Known more commonly as Prince Harry, the second son of Prince Charles and Princess Diana was born in 1984.

After his schooling, Prince Harry spent a large chunk of his gap year working on a cattle farm in Australia.

He joined the military in 2005 and went on to serve in Afghanistan twice.

In 2016, the prince surprised the world by confirming his relationship with American actress Meghan Markle in an official statement.

The couple announced their engagement in November 2017 and will wed at Windsor Castle in May 2018.

9 of 15

Catherine, Duchess of Cambridge

The future queen consort met Prince William at university in Scotland, where she was studying art history.

The couple dated for roughly eight years, with a brief period of separation, before announcing their engagement in 2010.

Their wedding at Westminster Abbey the following year is said to have attracted a worldwide audience of more than 300 million people.

Catherine fell pregnant with her first child in 2012 and was hospitalised with hyperemesis gravidarum, a complication resulting in extreme nausea.

She suffered the condition again while pregnant with Princess Charlotte and during her third pregnancy in 2017. The 35-year-old is due to give birth in April 2018.

10 of 15

Prince George of Cambridge

At just four years of age, George Alexander Louis is third in line to the British throne.

The first ‘royal baby’ of the Duke and Duchess of Cambridge, he was born amid a global media frenzy in 2013 and has since accompanied his parents on numerous overseas tours.

George lives at Kensington Palace in London and started school at Thomas’s Battersea in September 2017.

Security fears were realised days later when a royal fan gained unlawful access to the school premises.

11 of 15

Princess Charlotte of Cambridge

Born in 2015, Charlotte Elizabeth Diana is fourth in the line of succession, thanks to legislation enacted in 2011 that put an end to the tradition of male children taking precedent over their sisters.

The two-year-old has already experienced two royal tours, accompanying her family to Canada in 2016 and Germany and Poland in 2017.

She was a bridesmaid in her aunty Pippa Middleton’s wedding in early 2017 and will be involved in the wedding of Prince Harry and Meghan Markle, along with her brother George.

From January 2018, she will attend a nursery school in London.

12 of 15

Anne, Princess Royal and Prince Andrew, Duke of York

The second and third children of Queen Elizabeth and Prince Philip, Anne and Andrew are twelfth and seventh in the line of succession, respectively.

Both have two children each.

Princess Anne is known for her charitable work and equestrian prowess; she was the first royal to compete in the Olympic Games.

Prince Andrew holds the rank of commander in the Royal Navy, and until 2011 served as Britain's Special Representative for International Trade and Investment.

13 of 15

Zara Tindall (nee Phillips)

Zara is the second child and only daughter of Princess Anne and her former husband Captain Mark Phillips.

She is a champion horse rider, who won a silver medal for equestrian at the 2012 Olympics in London.

Zara married former rugby union player Mike Tindall in 2011, and they welcomed their daughter Mia in January 2014.

The couple’s second pregnancy ended in miscarriage at the end of 2016.

14 of 15

Princess Beatrice and Princess Eugenie of York

The daughters of Prince Andrew and his former wife Sarah, Duchess of York, are regularly spotted at royal and society events.

The sisters are currently seventh and eighth in the line of succession respectively, though this will change with the arrival of the Duke and Duchess of Cambridge’s third baby.

Both are university educated; Beatrice is reported to work in business consultancy, while Eugenie is an art gallery director.

Princess Eugenie is particularly close to Prince Harry and Meghan Markle, and helped conceal the couple’s relationship from the press.

15 of 15

Prince Edward and Sophie, Countess of Wessex

Edward, the youngest son of Queen Elizabeth and Prince Philip, wed Sophie Rhys-Jones in 1999.

They met for the first time in 1987, when the prince was dating one of Sophie’s friends, and began dating six years later.

The couple have two children together - James, Viscount Severn, and Lady Louise Windsor.

Sophie previously worked in public relations and now assists her husband in his duties. She is reportedly a “favourite” family member of Queen Elizabeth’s.